Learning-by-exporting in Korean Manufacturing: A Plant-level Analysis

The paper analyzes whether firms that start exporting become more productive utilizing recently developed sample matching procedures to control the problems from self-selection into the export market. We use plant level panel data on Korean manufacturing sector from 1990 to 1998. We find clear and robust empirical evidence in favor of the learning-by-exporting effect; total factor productivity differentials between exporters and their domestic counterparts arises and widens during several years after export market entry. We also find that the effect is more pronounced for firms that have higher skill-intensity, higher share of exports in production, and are small in size. Overall, the evidence suggests that exporting is one important channel through which domestic firms acquire accesses to advanced knowledge and better technology. Also, the stronger learning-by-doing effect for firms with higher skill-intensity seems to support the view that gabsorptive capacityh matters to receive knowledge spillovers from exporting activity.Learning-by-exporting, Productivity, Propensity score matching

Learning-by-exporting in Korean Manufacturing: A Plant-level Analysis

The paper analyzes whether firms that start exporting become more productive utilizing recently developed sample matching procedures to control the problems from self-selection into the export market. We use plant level panel data on Korean manufacturing sector from 1990 to 1998. We find clear and robust empirical evidence in favor of the learning-by-exporting effect; total factor productivity differentials between exporters and their domestic counterparts arises and widens during several years after export market entry. We also find that the effect is more pronounced for firms that have higher skill-intensity, higher share of exports in production, and are small in size. Overall, the evidence suggests that exporting is one important channel through which domestic firms acquire accesses to advanced knowledge and better technology. Also, the stronger learning-by-doing effect for firms with higher skill-intensity seems to support the view that "absorptive capacity" matters to receive knowledge spillovers from exporting activity.Learning-by-exporting, Productivity, Propensity score matching.

Polynomial extensions of semistar operations

We provide a complete solution to the problem of extending arbitrary semistar operations of an integral domain $D$ to semistar operations of the polynomial ring $D[X]$. As an application, we show that one can reobtain the main results of some previous papers concerning the problem in the special cases of stable semistar operations of finite type or semistar operations defined by families of overrings. Finally, we investigate the behavior of the polynomial extensions of the most important and classical operations such as $d_D$, $v_D$, $t_D$, $w_D$ and $b_D$ operations

An Analysis of the Performing Arts Consumer: Developing market segments by using CHAID

This study explored how the interaction between performing arts consumers’ characteristics and art-related experiences were associated with out-of-state and/or out-of-country performing arts attendance. A decision tree was developed using Exhaustive CHAID. Data were collected through an online survey of E-club members of the Wharton Center for Performing Arts at Michigan State University. This study focused on the heavy consumers, who represented approximately 30% of the performing arts market and accounted for over 50% of actual spending on tickets. The results identified important predictors and distinguished viable five segments. Chi-square tests and one-way ANOVAs were conducted to examine significant differences among segments. The identified target segments and their profiles will be essential in building effective communication and promotion strategies for various marketing purposes

Damage detection and identification of parameter matrices using residual force vector

Beginning with incomplete mode shape measurement data, this study presents analytical equations to predict the actual stiffness and mass matrices. The measured modal data, including the measurement, manufacturing and modeling errors, should be updated for subsequent analysis. In this study, the incomplete mode shape data are expanded to a full set of degrees-of-freedom (DOFs) based on the generalized inverse method and the concept of residual force vector. The corrected parameter matrices are straightforwardly derived using the estimated mode shape data and the pseudo inverse method. The validity of the proposed method is evaluated based on the number of measured modes in an application, and its limitations are investigated

A Comparison Model of Residents’ and Tourists’ Attitudes toward Sustainable Tourism Development: A Case of Penghu Island in Taiwan

Two stakeholders, residents and tourists, play critical roles in developing and promoting sustainable tourism planning and development. Little research has been done to investigate simultaneously both residents’ and tourists’ attitudes toward sustainable tourism development. This study was conducted to fill in the gap. Residents who lived in Penghu Island in Taiwan and Taiwanese tourists who visited Penghu were surveyed for the study. Following the web- based online survey, structural equation modeling was carried out to identify the direction and relationships among five sets of tourism development impacts and support for sustainable tourism in Penghu. The results of residents’ and tourists’ attitudes models indicated that positive economic and cultural dimensions greatly influenced their support for sustainable tourism development. Managerial and marketing implications of the findings are discussed

Epidemiological Aspects of Exotic Malaria and Dengue Fever in Travelers in Korea

In order to compare the epidemiological aspects of exotic malaria (EM) and dengue fever (DF) imported by travelers in Korea, we have analyzed the current state both of the disease incidence and related risk factors. A total of 345 cases of EM occurred between 2001 and 2008 in Korea, and the average incidence rate per 100,000 population was 0.091. A total of 252 of DF cases occurred during the same period, and its rate was 0.063. While most of the EM and DF prevalence occurred in summer, prevalence in spring and winter was more prominent for EM (P < 0.05 ~ P < 0.01), while outbreaks in summer were more frequent for DF (P < 0.01). In Korea, more males were infected with EM and DF than females (P < 0.01). The remarkable difference between gender distributions in Korea is believed to reflect cultural differences in terms of work and travel. In both diseases, the manhood age bracket (20 - 39 years old) is possible due to increased oversea activities and travel. Moreover, reported EM cases in several prefectures in the regions of Asia and Africa were widely spread by the appropriate vector of mosquitoes, while the vectors of DF in the region of Asia are limited